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1-48 of 78 results for "aquarium PH & Alkalinity additive"

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This product is highly rated, well-priced, and available to ship immediately.
Tetra Correct pH Tablets 8 Count, For aquarium Water

Tetra Correct pH Tablets 8 Count, For aquarium Water

4.5 out of 5 stars
3,200
1K+ bought in past month
$2.92$2.92
List: $4.19$4.19
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Or fastest delivery Tue, May 14
API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container

API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container

4.5 out of 5 stars
2,392
1K+ bought in past month
$9.89$9.89
List: $15.78$15.78
$9.40 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Brightwell Aquatics pH+, pH Increaser for All Marine and Freshwater Aquariums - 125 ml

Brightwell Aquatics pH+, pH Increaser for All Marine and Freshwater Aquariums - 125 ml

4.3 out of 5 stars
128
$7.06$7.06
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More results
Brightwell Aquatics Alkalin8.3 - Concentrated KH Buffer Supplement for All Marine and Reef Aquariums

Brightwell Aquatics Alkalin8.3 - Concentrated KH Buffer Supplement for All Marine and Reef Aquariums

4.7 out of 5 stars
127
$31.81$31.81
Save more with Subscribe & Save
FREE delivery Fri, May 17 on $35 of items shipped by Amazon
Or fastest delivery Thu, May 16
Only 5 left in stock (more on the way).
More Buying Choices
$27.22(3 new offers)
Seachem Alkaline Regulator 250gram

Seachem Alkaline Regulator 250gram

4.4 out of 5 stars
101
50+ bought in past month
$13.19$13.19
$12.53 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Alkaline Buffer, 300 g / 10.5 oz

Alkaline Buffer, 300 g / 10.5 oz

4.7 out of 5 stars
1,182
400+ bought in past month
Limited time deal
$9.99$9.99
List: $13.58$13.58
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FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Seachem Reef Carbonate 500ml

Seachem Reef Carbonate 500ml

4.7 out of 5 stars
345
100+ bought in past month
$6.87$6.87
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Brightwell Aquatics Reef Code A - Balanced Calcium and Alkalinity System for Marine Fish & Reef Aquariums 250-ml

Brightwell Aquatics Reef Code A - Balanced Calcium and Alkalinity System for Marine Fish & Reef Aquariums 250-ml

4.6 out of 5 stars
234
$11.25$11.25
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 17 left in stock (more on the way).
Brightwell Aquatics Alkalin8.3-P - Alkaline KH Buffer Powder for All Marine and Reef Aquariums

Brightwell Aquatics Alkalin8.3-P - Alkaline KH Buffer Powder for All Marine and Reef Aquariums

4.5 out of 5 stars
75
$20.69$20.69
Typical: $24.42$24.42
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$14.20(5 new offers)
More results
API pH UP Freshwater Aquarium Water pH Raising Solution for fish,4-Ounce Bottle, Brown

API pH UP Freshwater Aquarium Water pH Raising Solution for fish,4-Ounce Bottle, Brown

4.5 out of 5 stars
2,365
700+ bought in past month
$6.29$6.29
List: $9.88$9.88
$5.98 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Reef Carbonate, 2 L / 67.6 fl. oz.

Reef Carbonate, 2 L / 67.6 fl. oz.

4.6 out of 5 stars
67
$25.15$25.15
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FREE delivery Wed, May 15 on $35 of items shipped by Amazon
KORDON #35316 pH Increase Adjuster for Aquarium, 16-Ounce

KORDON #35316 pH Increase Adjuster for Aquarium, 16-Ounce

4.5 out of 5 stars
397
200+ bought in past month
$7.01$7.01
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Seachem Acid Buffer 300gram

Seachem Acid Buffer 300gram

4.7 out of 5 stars
694
200+ bought in past month
$13.46$13.46
List: $15.86$15.86
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$12.34(14 new offers)
API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle

API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle

4.6 out of 5 stars
753
200+ bought in past month
$10.69$10.69
FREE delivery Thu, May 16 on $35 of items shipped by Amazon
Or fastest delivery Wed, May 15
KORDON #35326 pH Decrease Adjuster for Aquarium, 16-Ounce

KORDON #35326 pH Decrease Adjuster for Aquarium, 16-Ounce

4.2 out of 5 stars
251
200+ bought in past month
$7.00$7.00
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Seachem Reef Buffer 250gram

Seachem Reef Buffer 250gram

4.7 out of 5 stars
556
50+ bought in past month
$7.12$7.12
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Seachem Alkaline Buffer 600gram

Seachem Alkaline Buffer 600gram

4.8 out of 5 stars
519
50+ bought in past month
$17.51$17.51
$16.63 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$17.50(13 new offers)
API PROPER pH 8.2 Freshwater Aquarium Water pH Stabilizer 7.4-Ounce Container

API PROPER pH 8.2 Freshwater Aquarium Water pH Stabilizer 7.4-Ounce Container

4.5 out of 5 stars
678
100+ bought in past month
$9.89$9.89
Typical: $10.98$10.98
$9.40 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
KORDON #35314 pH Increase Adjuster for Aquarium, 4-Ounce

KORDON #35314 pH Increase Adjuster for Aquarium, 4-Ounce

4.2 out of 5 stars
9
$5.89$5.89
Typical: $6.31$6.31
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container

API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container

4.5 out of 5 stars
236
50+ bought in past month
$9.89$9.89
List: $15.78$15.78
$9.40 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Imagitarium pH Reducer, 4oz

Imagitarium pH Reducer, 4oz

4.4 out of 5 stars
13
$7.99$7.99 ($7.99$7.99/Count)
FREE delivery May 16 - 22
Or fastest delivery May 14 - 16
Only 20 left in stock - order soon.
More Buying Choices
$7.90(3 new offers)
Fritz Aquatics 81103 Fritz pH Lower for Fresh and Salt Water Aquariums, 16-Ounce

Fritz Aquatics 81103 Fritz pH Lower for Fresh and Salt Water Aquariums, 16-Ounce

4.4 out of 5 stars
506
$18.10$18.10
Typical: $19.21$19.21
FREE delivery May 24 - 30
Or fastest delivery May 23 - 29
Brightwell Aquatics Florin pH- - Water Conditioner to Lower pH Level in Freshwater, Planted, and Marine Saltwater Aquarium...

Brightwell Aquatics Florin pH- - Water Conditioner to Lower pH Level in Freshwater, Planted, and Marine Saltwater Aquariums, 500-ml

3.5 out of 5 stars
6
$15.81$15.81
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 8 left in stock (more on the way).
Tetra EasyBalance Plus 3.38 Ounces, Weekly Freshwater Aquarium Water Conditioner (836135)

Tetra EasyBalance Plus 3.38 Ounces, Weekly Freshwater Aquarium Water Conditioner (836135)

4.6 out of 5 stars
1,495
50+ bought in past month
$6.00$6.00
List: $7.04$7.04
$5.70 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Continuum Aquatics Basis Borate Free KH Buffer - Professional Alkalinity Boosting pH and KH Control for Marine Fish and Re...

Continuum Aquatics Basis Borate Free KH Buffer - Professional Alkalinity Boosting pH and KH Control for Marine Fish and Reef Saltwater Aquariums

5.0 out of 5 stars
1
$10.14$10.14
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 9 left in stock (more on the way).
Imagitarium pH Enhancer, 4oz

Imagitarium pH Enhancer, 4oz

4.7 out of 5 stars
7
$7.99$7.99 ($7.99$7.99/Count)
FREE delivery May 15 - 16
Fritz Aquatics 80285 Fritz pH Neutralizer for Fresh and Salt Water Aquariums, 1-LBS

Fritz Aquatics 80285 Fritz pH Neutralizer for Fresh and Salt Water Aquariums, 1-LBS

4.4 out of 5 stars
126
$24.99$24.99
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 1 left in stock - order soon.
Continuum Aquatics Flora Viv KH+ - Alkalinity Booster & pH Stabilizer for Freshwater Aquariums, 1000 Grams / 1Kg

Continuum Aquatics Flora Viv KH+ - Alkalinity Booster & pH Stabilizer for Freshwater Aquariums, 1000 Grams / 1Kg

4.2 out of 5 stars
79
$20.26$20.26
Typical: $23.07$23.07
Save more with Subscribe & Save
FREE delivery Mon, May 20 on $35 of items shipped by Amazon
Or fastest delivery Thu, May 16
API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit (29A)

API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit (29A)

4.6 out of 5 stars
786
200+ bought in past month
$11.69$11.69 ($11.69$11.69/Count)
List: $18.28$18.28
Save more with Subscribe & Save
FREE delivery Thu, May 16 on $35 of items shipped by Amazon
Or fastest delivery Wed, May 15
Fritz Aquatics 81104 Fritz pH Higher for Fresh and Salt Water Aquariums, 16-Ounce

Fritz Aquatics 81104 Fritz pH Higher for Fresh and Salt Water Aquariums, 16-Ounce

4.1 out of 5 stars
154
$18.85$18.85
FREE delivery May 24 - 30
Or fastest delivery May 23 - 29
More Buying Choices
$17.81(2 new offers)
Fluval Sea Alkalinity for Aquarium, 16-Ounce

Fluval Sea Alkalinity for Aquarium, 16-Ounce

4.7 out of 5 stars
6
$19.99$19.99
FREE delivery Mon, May 20
Only 2 left in stock - order soon.
Fluval Sea Alkalinity for Aquarium, 8-Ounce

Fluval Sea Alkalinity for Aquarium, 8-Ounce

4.4 out of 5 stars
114
50+ bought in past month
$7.99$7.99
$7.59 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Fritz Aquatics 80301 Fritz RPM Alkalinity Buffer Reef Aquarium Supplement PT 1, 32-Ounce

Fritz Aquatics 80301 Fritz RPM Alkalinity Buffer Reef Aquarium Supplement PT 1, 32-Ounce

4.5 out of 5 stars
69
$22.56$22.56
FREE delivery May 14 - 16
Or fastest delivery May 13 - 15
Only 4 left in stock - order soon.
More Buying Choices
$22.44(4 new offers)
Seachem Ph Alert for Freshwater

Seachem Ph Alert for Freshwater

3.9 out of 5 stars
170
$7.59$7.59
Typical: $10.96$10.96
FREE delivery May 15 - 17
Or fastest delivery Tue, May 14
Only 2 left in stock - order soon.
Seachem Neutral Regulator 250gram

Seachem Neutral Regulator 250gram

4.6 out of 5 stars
2,047
600+ bought in past month
$7.24$7.24
List: $11.48$11.48
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Seachem MultiTest - Marine pH/Alkalinity - 75 Tests

Seachem MultiTest - Marine pH/Alkalinity - 75 Tests

3.7 out of 5 stars
23
$18.13$18.13
FREE delivery Thu, May 16 on $35 of items shipped by Amazon
Or fastest delivery Wed, May 15
Only 14 left in stock - order soon.
Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack)

Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack)

4.6 out of 5 stars
308
50+ bought in past month
$13.02$13.02
List: $17.99$17.99
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$12.99(6 new offers)
API Proper pH 7.5 Freshwater Aquarium Water pH Stabilizer 9.2-Ounce Container, Proper PH 7.5 PWDR JAR-Small, Whites & Tan...

API Proper pH 7.5 Freshwater Aquarium Water pH Stabilizer 9.2-Ounce Container, Proper PH 7.5 PWDR JAR-Small, Whites & Tans, 260 Grams

4.4 out of 5 stars
584
100+ bought in past month
$16.96$16.96
$16.11 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$15.28(6 new offers)
Fritz Alkalinity (KH) Test Kit | Measures dKH in Fersh & Salt Water Aquarium Fish Tanks

Fritz Alkalinity (KH) Test Kit | Measures dKH in Fersh & Salt Water Aquarium Fish Tanks

$16.45$16.45 ($16.45$16.45/Count)
FREE delivery May 14 - 16
Or fastest delivery May 13 - 15
More Buying Choices
$15.99(5 new offers)
Brightwell Aquatics Florin Delta KH+ - Increases Carbonate Hardness and pH Stability in Freshwater and Planted Aquariums 5...

Brightwell Aquatics Florin Delta KH+ - Increases Carbonate Hardness and pH Stability in Freshwater and Planted Aquariums 500-g

4.1 out of 5 stars
17
$18.65$18.65
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Red Sea Aqcult 306168 1 LTR Reefer Foundation B Alkalin

Red Sea Aqcult 306168 1 LTR Reefer Foundation B Alkalin

4.7 out of 5 stars
253
200+ bought in past month
$26.84$26.84
List: $32.82$32.82
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
ESV Aquatics Bionic Part 1 Treatment, Alkalinity

Bionic Part 1 Treatment, Alkalinity

4.0 out of 5 stars
39
$25.58$25.58
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 5 left in stock - order soon.
API PH TEST KIT 250-Test Freshwater Aquarium Water pH Test Kit, 4 Piece Set

API PH TEST KIT 250-Test Freshwater Aquarium Water pH Test Kit, 4 Piece Set

4.6 out of 5 stars
3,197
400+ bought in past month
$7.18$7.18 ($7.18$7.18/Count)
List: $11.28$11.28
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Only 1 left in stock - order soon.
Reef Carbonate, 4 L / 1 fl. gal.

Reef Carbonate, 4 L / 1 fl. gal.

4.8 out of 5 stars
3
$38.04$38.04
FREE delivery Wed, May 15
Only 17 left in stock (more on the way).
Alkaline Buffer, 70 g / 2.5 oz

Alkaline Buffer, 70 g / 2.5 oz

4.5 out of 5 stars
205
$9.37$9.37
$8.90 with Subscribe & Save discount
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
More Buying Choices
$8.96(7 new offers)
Fluval 3 Ions Fluval Sea Trace for Aquarium, 8-Ounce

Fluval 3 Ions Fluval Sea Trace for Aquarium, 8-Ounce

4.6 out of 5 stars
68
$8.27$8.27
List: $11.99$11.99
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalinity (KH) - Builder 250mL / 8.5oz

Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalinity (KH) - Builder 250mL / 8.5oz

5.0 out of 5 stars
3
$14.65$14.65
FREE delivery May 15 - 17
More Buying Choices
$11.99(5 new offers)
API Perfect Start Complete Aquarium Start Up Program Additive, 1 Count (Pack of 1)

API Perfect Start Complete Aquarium Start Up Program Additive, 1 Count (Pack of 1)

4.4 out of 5 stars
151
50+ bought in past month
$14.78$14.78
Typical: $18.70$18.70
Save more with Subscribe & Save
FREE delivery Wed, May 15 on $35 of items shipped by Amazon
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